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Brand Name
Tenormin
Pronunciation
a-TEN-oh-lol
Common Drug Name
Atenolol
What should I discuss with my veterinarian while considering Atenolol?
Talk to your veterinarian about what tests and exams may be necessary while your pet is taking Atenolol. Also discuss what type of outcome is expected. Have your veterinarian explain any other treatment options for your pet.
Tell your veterinarian if your pet has kidney disease or diabetes or may be pregnant, is nursing, or if you intend to breed your pet.
Notify your veterinarian of any other medications or supplements your pet is taking, and also if your pet has had any reactions to previous medications.
What should I do if I miss a dose?
If you miss a dose, give it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to the regular schedule. Do not give two doses at once.
What is the most important information I should know?
Conditions requiring treatment with Atenolol are serious and require close monitoring by your veterinarian. Follow your veterinarian's directions closely and do not discontinue the drug abruptly or without directions from your veterinarian, or your pet's condition may become worse.
Who should not take it?
Atenolol is not for use in animals hypersensitive (allergic) to Atenolol. Use with caution in animals with kidney disease. Use with caution in animals with diabetes since it can affect blood sugar levels. Use with caution in animals with some types of lungs disease such as asthma.
Do not use in animals with certain heart conditions such as heart block, bradycardia (slow heart
rate), and some types of heart failure.
What side effects may be seen when taking Atenolol?
May cause tiredness, diarrhea; low blood pressure which would cause faintness, weakness, or dizziness. May constrict the bronchi, causing coughing, wheezing, or difficulty breathing. It may cause the heart
rate to be too slow if given at an improper dose. Consult with your veterinarian if you notice any of the above side effects.
If your pet experiences an allergic reaction to the medication, signs may include facial swelling, hives, scratching, sudden onset of diarrhea, vomiting, shock, seizures, pale gums, cold limbs, or coma. If you observe any of these signs, contact your veterinarian immediately.
How is it stored?
Store at room temperature in a tight, light-resistant, childproof container. Keep out of reach of children and pets.
What should I do if I know of or suspect there has been an overdose?
Should overdose occur, you may see very slow heart rate, inability to exercise, shortness of breath, cough, or change in behavior or attitude. If you know or suspect your pet has had an overdose, or if you observe any of these signs in your pet, contact your veterinarian immediately.
What should I avoid when giving my pet Atenolol?
Consult your veterinarian before using Atenolol with vitamins, supplements, terbutaline, epinephrine, phenylpropanolamine, phenothiazines (tranquilizers such as acepromazine), furosemide (Lasix), hydralazine, or insulin since interactions may occur.
Where is more information available?
Ask your veterinarian, consult with one of our pharmacists at 1-800-447-3021, or see the Patient Information Sheet on this medication. | 
